rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P8172/1:b..l
	(detected by 0, t=10502 jiffies, g=45817, q=165 ncpus=1)
task:dhcpcd-run-hook state:R  running task     stack:24464 pid:8172  ppid:3936   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5246 [inline]
 __schedule+0x107f/0x4030 kernel/sched/core.c:6563
 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6875
 irqentry_exit+0x63/0x70 kernel/entry/common.c:442
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:mt_validate_nulls arch/x86/include/asm/atomic.h:-1 [inline]
RIP: 0010:mt_validate+0x43ef/0x4c60 lib/maple_tree.c:7249
Code: 98 be 04 00 00 00 e8 80 11 ab f7 f0 ff 05 e9 bd e5 0d 48 c7 c7 a0 50 0e 98 be 04 00 00 00 e8 68 11 ab f7 f0 ff 05 f1 bd e5 0d <48> bb 00 00 00 00 00 fc ff df 4c 8b b4 24 b8 00 00 00 45 89 f7 41
RSP: 0018:ffffc9000c8cf440 EFLAGS: 00000207
RAX: ffffffff8a289201 RBX: 000000000000000a RCX: ffffffff8a2892a8
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff980e50a0
RBP: ffffc9000c8cf5f0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff301ca14 R12: ffff88802f5f6ed8
R13: ffff888062645c80 R14: 0000000000000001 R15: 0000000000000300
 validate_mm_mt+0xd9/0x420 mm/mmap.c:295
 validate_mm+0xe1/0x2e0 mm/mmap.c:332
 do_mas_align_munmap+0x102d/0x12d0 mm/mmap.c:2599
 do_mas_munmap+0x240/0x2b0 mm/mmap.c:2650
 __mmap_region mm/mmap.c:2698 [inline]
 mmap_region+0x7ab/0x1c50 mm/mmap.c:2916
 do_mmap+0x9ce/0x10d0 mm/mmap.c:1436
 vm_mmap_pgoff+0x1c1/0x2d0 mm/util.c:520
 ksys_mmap_pgoff+0x4bf/0x720 mm/mmap.c:1482
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7c17af1242
RSP: 002b:00007ffe46767408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f7c177cb000 RCX: 00007f7c17af1242
RDX: 0000000000000001 RSI: 0000000000002000 RDI: 00007f7c177cb000
RBP: 0000000000000812 R08: 0000000000000003 R09: 0000000000005000
R10: 0000000000000812 R11: 0000000000000206 R12: 00007ffe46767490
R13: 00007f7c177d00c0 R14: 00007ffe46767840 R15: 00000fffc8cece84
 </TASK>
rcu: rcu_preempt kthread starved for 9834 jiffies! g45817 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:I stack:28112 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5246 [inline]
 __schedule+0x107f/0x4030 kernel/sched/core.c:6563
 preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:6732
 preempt_schedule+0xbc/0xd0 kernel/sched/core.c:6756
 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock_irqrestore+0x10d/0x120 kernel/locking/spinlock.c:194
 init_timer_on_stack_key kernel/time/timer.c:805 [inline]
 schedule_timeout+0x12d/0x2d0 kernel/time/timer.c:2166
 rcu_gp_fqs_loop+0x303/0x1350 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x99/0x3b0 kernel/rcu/tree.c:1905
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 8174 Comm: syz.4.1223 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:__sanitizer_cov_trace_pc+0x58/0x60 kernel/kcov.c:230
Code: f8 15 00 00 83 fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 48 8d 7e 01 8b 89 fc 15 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 08 <c3> 0f 1f 80 00 00 00 00 48 8b 04 24 65 48 8b 15 54 28 80 7e 65 8b
RSP: 0018:ffffc9000c9b7898 EFLAGS: 00000246
RAX: ffffffff83d207b6 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc9000dad7000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 0000000000000000 R08: ffffc9000c9b79ff R09: ffffc9000c9b7980
R10: dffffc0000000000 R11: fffff52001936f40 R12: 1ffff92001936fa8
R13: 0000000000000002 R14: ffffc9000c9b7d20 R15: ffff8880729c6600
FS:  00007f2b5a62b6c0(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 00000000610a6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 security_socket_recvmsg+0x26/0xb0 security/security.c:2284
 sock_recvmsg net/socket.c:1039 [inline]
 ____sys_recvmsg+0x221/0x5b0 net/socket.c:2738
 ___sys_recvmsg+0x210/0x590 net/socket.c:2780
 do_recvmmsg+0x370/0x810 net/socket.c:2874
 __sys_recvmmsg net/socket.c:2953 [inline]
 __do_sys_recvmmsg net/socket.c:2976 [inline]
 __se_sys_recvmmsg net/socket.c:2969 [inline]
 __x64_sys_recvmmsg+0x195/0x250 net/socket.c:2969
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2b5979f559
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2b5a62b028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f2b59a25fa0 RCX: 00007f2b5979f559
RDX: 0000000000010106 RSI: 0000200000000240 RDI: 0000000000000003
RBP: 00007f2b59836b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2b59a26038 R14: 00007f2b59a25fa0 R15: 00007ffdd6d50378
 </TASK>